Other Current And Long-term Assets (Schedule Of Other Current Assets, Net) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Other Current And Noncurrent Assets [Abstract]
Prepaid expenses	$ 30,378	$ 32,672
Taxes receivable	12,906	28,926
Customer acquisition costs, net	14,230	11,262
Other assets	10,045	13,591
Other current assets, net	$ 67,559	$ 86,451